Swapping Campag 9 and 10 speed freehubs

Probably obvious but how easy/possible is it to swop a 10 speed Campag freehub for a 9 speed one? Any tools or particular expertise required?

no need... they are the same free hub

The ones I have don't have the same spline pattern.......

Thats weird.. Im assuming its not a campagnolo hub then or at least a dilemma i haven't encountered with campagnolo hubs. What brand is the hub (not free hub)? Its not the same exact procedure on all hubs.

They have different spline patterns but they do fit. This is really useful: http://branfordbike.com/articles/cassettes-and-cogs-pg60.htm

With the different spline patte n I didn't even think of trying the cassettes to see if they fit but from the Branford Bike link it sounds like it should work - I'll give it a go and feedback.

As advised above, fits absolutely fine.

Never underestimate the strength of street knowledge....

All the different 9 10 11 speed spline patterns well there are two are interchangable when it comes to cassesettes. The later spline pattern is a bit lighter that is why it exists.

not strictly true, nucleons do not take an 11 speed > http://www.ebay.co.uk/gds/Campagnolo-Nucleon-vs-Neutron-Wheels-with-11-Speed-/10000000024084469/g.html

Hijacking the thread, sorry.

The bearings are knackered on my campag freehub, is it easy enough to replace them (internal sealed) or shall I just replace the freehub?